Reynolds, Jr., R.C., Whitney, P.R., Isachsen, Y.W., 1969. K/Rb Ratios in Anorthositic and Associated Charnockitic Rocks of the Adirondacks, and Their Petrogenetic Implications, in: Isachsen, Y.W. (Ed.), Origin Of Anorthosite And Related Rocks. The University of the State of New York, Albany, New York, pp. 267-280.